/// <summary>
/// Called when [selected picture header].
/// </summary>
/// <param name="payload">The payload.</param>
/// <returns></returns>
private async Task OnSelectedPictureHeader(object payload)
{
try
{
IsUserInterfaceEnabled = false;
var picHeader = payload as PictureHeaderViewModel;
MessageHub.Publish(MessageNames.StatusAvailable, $"Loading selected {picHeader.Name}, Taken on {picHeader.DateTakenUtc}");
if (picHeader == null)
{
return;
}
// Save the picture before switching it.
if (CurrentPicture != null)
{
await StoreProvider.AddOrUpdatePictureAsync(CurrentPicture);
}
CurrentPicture = await StoreProvider.LoadPictureAsync(picHeader.PictureId);
MessageHub.Publish(MessageNames.StatusAvailable, "Ready");
}
catch (Exception ex)
{
// We send a status message to the hub but it should really be an Error message of its own type
MessageHub.Publish(MessageNames.StatusAvailable, $"Error: {ex.Message}");
}
finally
{
IsUserInterfaceEnabled = true;
}
}
/// <summary>
/// Called when [take picture command].
/// </summary>
/// <param name="payload">The payload.</param>
/// <returns></returns>
public async Task OnTakePictureCommand(object payload)
{
try
{
IsUserInterfaceEnabled = false;
MessageHub.Publish(MessageNames.StatusAvailable, $"Taking picture from camera . . .");
var pictureBytes = await Device.TakePicture();
var pictureLocation = await Device.ReadLocation();
var picture = new PictureViewModel
{
ImageBytes = pictureBytes
};
picture.Header.DateTakenUtc = DateTime.UtcNow;
picture.Header.Location.Latitude = pictureLocation.Latitude;
picture.Header.Location.Longitude = pictureLocation.Longitude;
picture.Header.Name = $"Taken at {DateTime.UtcNow.ToShortTimeString()}";
picture.Header.PictureId = Guid.NewGuid();
await StoreProvider.AddOrUpdatePictureAsync(picture);
PictureHeaders.Add(picture.Header);
SelectedPictureHeader = picture.Header;
MessageHub.Publish(MessageNames.StatusAvailable, "Ready");
}
catch (Exception ex)
{
// We send a status message to the hub but it should really be an Error message of its own type
MessageHub.Publish(MessageNames.StatusAvailable, $"Error: {ex.Message}");
}
finally
{
IsUserInterfaceEnabled = true;
}
}